Please determine all the sixth squareroots of -64. Give your answer in rectangular form Please express - 12i in polar form. Please express 4cis (5 pi/4) in rectangular form. Please determine the principal value of (1 + i)^3 - 2i. You may leave your answer in polar form. Please evaluate (10 + i) (8 - 2i) Please evaluate (3 + 2i) -(4 - 7i) Please evaluate i^217. Solution.